/Engine/Plugins/Runtime/XRBase/Source/XRBase/Public/XRMotionControllerBase.h
Called to request the motion sources that thisIMotionControllerprovides
virtual void EnumerateSources ( [TArray](API\Runtime\Core\Containers\TArray)< [FMotionControllerSource](API\Runtime\HeadMountedDisplay\FMotionControllerSource) > & SourcesOut ) const